A. collision B. discipline C. out of order D. appeal to A. think over B. see you tomorrow C. steam D. spread A. background B. boot C. familiarity D. play with A. plain clothes B. outpatient C. jumper D. computer A. whisper B. gymnastics C. knee D. rely on A. candy B. critic C. heat D. cigar A. rather than B. petrify C. official D. pay for A. incur B. private C. suspend D. daily A. constantly B. operator C. sit-up D. as well as A. seed B. soldier C. complex D. relax